Air Pollution (Gas Sensor)
• Output Metric: Airpollution Level (%)
• Measurement Range: 0~100%

Pollution Mapping Logic
• Clean Air (0%): Gas Resistance ≥ 50 kΩ
• Normal to Warning (0-65%): 50k Ω > Resistance > 18k Ω
• Warning to Critical (65-85%): 18k Ω ≥ Resistance > 5k Ω
• Critical to Max (85-100%): 5k Ω ≥ Resistance > 1.5k Ω
• Max Pollution (100%): Gas Resistance ≤ 1.5k Ω

Air Pressure
• Measurement Range: 300~1100 hPa
• Absolute Accuracy: ±0.5 hPa
• Relative Accuracy: ±0.05 hPa

Temperature
• Measurement Range: -40~85°C
• Measurement Resolution: 0.1°C increments (0.2°F increments)
• Accuracy: ±0.5°C (at 25°C)

Humidity
• Measurement Range: 0~100% RH
• Accuracy: ±3% RH (typical)
• Measurement Resolution: 1% RH increments

Hardware
• Standard Cable Length: 5 feet
• Maximum Cable Length: 100 feet
• Sensor Count: 4